# 第一个注释
# print("hello world")  # 第二个注释
# s = input("Enter a string: ")
# if s == "yes":
#     b = True
# elif s == "no":
#     b = False
# else:
#     print("Invalid input")
#     exit(1)
# if b:
#     print("b is true")
# else:
#     print("b is false")

list1 = [1, 2, 3]
tuple1 = (1, 2, 3)
dict1 = {"name": "John", "age": 20}

num = 10
print(bin(num))
print(oct(num))
print(hex(num))

print(2.0 == 2 or 2.0 == 3)


def bmi(weight, height):
    return weight / (height * height)


print(bmi(70, 1.7))
